- 62 months ago
So I put together my first build at the weekend and it went flawlessly :). The only problem I have now is I forgot to order an optical drive so I had a friend put a copy of windows 8.1 onto a flash drive so I could boot up and get it going. With the ''activate windows'' watermark getting annoying I've gone to input my serial code but it won't work because my friend has installed the 8.1 pro edition when I only have a serial code for 8.1. Is there any way without formatting my hard drives and starting again to downgrade so I can activate my copy?